I have an anxiety disorder I've been dealing with my whole life, so let me tell you how I deal with anxiety. Note: I am not a behavioral health professional. This is just me, dude with anxiety.
First of all, it's ok to be scared. It's ok to be anxious. (1)
Getting exercise helps.
Mindfulness and meditation help.
Getting enough sleep and eating right helps. (3)
When my grandmother died when I was 10 my grandfather told me something important too. Sometimes its ok to cry. Feel that emotion. Get it out. (4)